[EN] This document provides the necessary technical explanations and calculations to build a photovoltaic
installation of 100 kWn connected to the grid, located on the warehouse’s deck of the “Cooperativa
Agrícola” of Concentaina.
The installation includes all the devices and material needed to ensure the right implementation of the
project and its perfect working, according to the results deduced from the calculations. The main
equipment consist of the photovoltaic modules and the inverter.
The 480 modules of 235 Wp installed allow the plant to reach a power of 112,8 kW. The direct current
needs to be converted into alternating current. According to the power of the installation and the
inverter’s and module’s parameters, the inverter’s nominal power has to be 100 kW. Therefore, the
energy produced by the installation annually reaches an amount of 169,330 kWh.
The calculation’s part results in the section and type of all cables installed, and gives the details of the
protection devices needed to ensure the security of people and the installation’s equipment.
The photovoltaic plant has been designed attempting to minimise the quotation. Thus, its total cost is
138,315.64 €. A part of the energy produced will be injected to the grid, and the rest of it will be used
to satisfy the warehouse’s energy demand. The reduction of the consumption from the grid and the
payment of the kWh injected to the grid lead to a benefit that make the project profitable, as the NPV
is positive, the IRR is 11,52%, and the investment is returned after 9 years.